linux-kernel - [PATCH] sched/rt: Fix unused-const-variable W=1 warning and style issue

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Message-Id: <20230119162233.887915-1-anuradha@debian.org>
Date:   Thu, 19 Jan 2023 21:52:32 +0530
From:   Anuradha Weeraman <anuradha@...ian.org>
To:     Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Juri Lelli <juri.lelli@...hat.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Ben Segall <bsegall@...gle.com>, Mel Gorman <mgorman@...e.de>,
        Daniel Bristot de Oliveira <bristot@...hat.com>,
        Valentin Schneider <vschneid@...hat.com>,
        linux-kernel@...r.kernel.org
Cc:     anuradha@...ian.org
Subject: [PATCH] sched/rt: Fix unused-const-variable W=1 warning and style issue

Compiler warning with W=1 due to unused constant in
    kernel/sched/rt.c:9:18: warning: ‘max_rt_runtime’ defined but not used

Fix by wrapping the variable in an #if check for CONFIG_SYSCTL and
CONFIG_RT_GROUP_SCHED, which are the only blocks where this variable
is referenced from.

Also, fix style issue for "else should follow close brace '}'".

Signed-off-by: Anuradha Weeraman <anuradha@...ian.org>
---
 kernel/sched/rt.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/kernel/sched/rt.c b/kernel/sched/rt.c
index ed2a47e4ddae..e46e76893a0c 100644
--- a/kernel/sched/rt.c
+++ b/kernel/sched/rt.c
@@ -5,8 +5,11 @@
  */
 
 int sched_rr_timeslice = RR_TIMESLICE;
+
+#if defined(CONFIG_SYSCTL) || defined(CONFIG_RT_GROUP_SCHED)
 /* More than 4 hours if BW_SHIFT equals 20. */
 static const u64 max_rt_runtime = MAX_BW;
+#endif
 
 static int do_sched_rt_period_timer(struct rt_bandwidth *rt_b, int overrun);
 
@@ -604,8 +607,7 @@ static void sched_rt_rq_dequeue(struct rt_rq *rt_rq)
 		dequeue_top_rt_rq(rt_rq, rt_rq->rt_nr_running);
 		/* Kick cpufreq (see the comment in kernel/sched/sched.h). */
 		cpufreq_update_util(rq_of_rt_rq(rt_rq), 0);
-	}
-	else if (on_rt_rq(rt_se))
+	} else if (on_rt_rq(rt_se))
 		dequeue_rt_entity(rt_se, 0);
 }
 
-- 
2.39.0